Identify Images With Duplicate Identification

[Paul Moles]

Have previously used Picasa for my photo management and embedded the 
facial image detail in the file metadata, this was often done by viewing 
an image and manually adding a face tag.

This initial metadata was picked up by digikam.

Having now adopted digikam and run "scan collection for faces" all 
files, quite a number of images now have slightly different areas but 
essentially the same face duplicate identified.

Is there any way of searching for images with this duplicate 
identification. ie Show all image where the same face is in the image 
more than once.

Thanks

Paul